Rtss Vblank status alternating 144hz/143hz on desktop

Discussion in 'Rivatuner Statistics Server (RTSS) Forum' started by fluidz, Nov 5, 2020.

  1. fluidz

    fluidz Master Guru

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    [​IMG]

    The value keeps switching between 143/144 in RTSS Vblank Status, I don't have any games/tasks running that would utilize vrr. Monitor - Acer xb271hu, refresh rate set to 144hz (Windows 10 reports it as 143.98hz). Gsync fullscreen mode enabled.

    The same happens if I set the monitor to 120hz, it fluctuates been 119hz and 120hz,

    I assume this is normal?
     
    Last edited: Nov 5, 2020
  2. Astyanax

    Astyanax Ancient Guru

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    refresh rates aren't static ints
     
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  3. mdrejhon

    mdrejhon Member Guru

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    Your refresh rate is not an integer -- Look at your decimal refresh rate at www.testufo.com/refreshrate

    It's just trunctating your floating point refresh rate to an integer. Sometime there's a rounding error or trunctation. 144.001Hz rounds down to 144Hz, and 143.996Hz rounds down to 143Hz. Personally I prefer rounding to nearest, rather than rounding down, since that's less confusing to users when the floating point refresh rate is calculated a tiny smidge incorrectly.

    Your fluctuation is usually in the order of 0.001, not 1Hz; it's just that most of the time your refresh rate is displayed is a round number. But if you benchmark it, you'll see your refresh rate is usually actually a decimal one.
     
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  4. Noisiv

    Noisiv Ancient Guru

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    Nothing in the real world measured precisely enough will turn out to be exactly an integer. That is if you're using normal units like SI (kg,m,s), and not something like Planck's units.
     

  5. fluidz

    fluidz Master Guru

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    Can somebody please explain this to me.

    Gsync fullscreen on - At 60hz, rtss vblank status shows the refresh rate dropping to 59hz roughly every 7 seconds. If I open Destiny 2, fullscreen/windowed mode, the in game framerate drops to 59fps every 7 seconds, the cursor/movement in game stutters every 7 seconds.

    Gsync off - At 60hz, rtss blank status shows vrr disabled (as expected), Destiny 2's in game framerate stays at a constant 60fps and does not drop to 59fps, there is no stuttering.

    I formatted windows and tested again, different Nvidia drivers, same thing happens, I have recorded a video of this behaviour if anyone wants to see it. I'm sure theres a sync issue between my monitor and the gpu when Gsync is enabled..

    Can somebody please download rtss vblank status and tell me if you see the exact same thing, At 60hz, Gsync on, does the refresh rate drop from 60hz to 59hz every 7 seconds. I would be very grateful. Download rtss vblank status here - https://www.forum-3dcenter.org/vbulletin/showthread.php?p=11931346#post11931346
     
    Last edited: Jan 13, 2021
  6. AsiJu

    AsiJu Ancient Guru

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    To me it sounds like your display is alternating between Gsync and regular Vsync at 60 Hz for some reason at 7 second intervals.

    Try capping the framerate to 59.9 fps with RTSS and disable ultra low latency mode if enabled.
    Alternatively set Vsync to disabled for Destiny 2 in NV CPL profile.

    I'm guessing if you set your desktop to 60 Hz then your VRR range also caps at 60 Hz and going past 60 frames per second - or 59.95 or w/e is your actual refresh rate - will make regular Vsync activate if enabled.

    Do you also see a stutter in eg. cursor movement on desktop every 7 seconds if you move the mouse?

    Btw if you cap the framerate in Destiny 2 with Gsync on you can keep your desktop/game refresh rate at 144 Hz.
    Using a 60 fps cap with 144 Hz refresh rate will make 100.0 % sure you are within VRR range always, as your display's VRR range is between 30 ... 144 Hz.

    (I'm not saying people should always cap that much below their VRR ceiling, heavens no, rather this will 100 % eliminate the chances of Vsync activating, which I guess is the issue here.

    I also assume you target 60 Hz / 60 fps for a reason with a 144 Hz display).
     
    Last edited: Jan 20, 2021

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